An interesting story, with a more intriguing character. I stand corrected about Harry being a mudblood, Silverfox and ilovesiriusblack are correct in stating that Harry is not a mudblood as that title is for magic people with muggle parents. Harry is a half-blood, as both his parents were magical, but not a pure blood because Lily is a mudblood. Although JKR never did state how many generations of witches/wizards had to be in the familytree to qualify one as pure.

Ok I've come to the conclusion that your Eric character is several fries short of a happy meal. I think he did just do it for fun. So here is my theory its far out there but for lack of evidence I feel it is as good as any other, Eric is head over heals in love with Katlin and he looks after Orion because he knows how devastated she'd be if anything happened to him? So how freezing cold am I?
Good luck with your operation and I look forward to your next story.